Prusa Mendel Documentation

A new reprap printer will built along the lines of the Prusa Mendel. You can find details of the Prusa design at the Prusa Mendel page on the reprap wiki, or you can view the sources for the Prusa at github

Intro

Having another 3d printer in the space will allow us to always have a working machine and to use one machine to help fix another if there are problems. It will also enable several people to print things out at the same time. The goal is to document this build so others can make their own printer following our documentation.

Status

Turns out the Imperial 5/16" washers are not a workable replacement for M8 washers, so we need to get those before the frame construction can begin. Also, we're still waiting on electronics from John.

Materials for the build

BOM for Prusa Mendel

Quantity	Description	Type	Comments
83	M8 nut	Fastener	READY
93	M8 washer	Fastener	NEEDED (the imperial 5/16" ones aren't gonna work)
6	M8×30 mudguard / fender washers	Fastener	READY
2	M4×20 bolt	Fastener	(John) / or use M5x20
2	M4 nut	Fastener	(John) / or use M5
2	M4 washer	Fastener	(John) / or use M5
22	M3×10 bolt	Fastener	READY
8	M3×20 bolt	Fastener	(John) / cut down 25mm or use as is
8	M3×25 bolt	Fastener	READY
4	M3×40 bolt	Fastener	(John) / cut down 50mm or use 35mm
70	M3 washer	Fastener	READY
40	M3 nut	Fastener	READY
2	M3 grub screw / set screw	Fastener	(John) / will the M3 x 8 in the space work?
3	608 roller skate / inline skate / skateboard bearing	Bearings	READY
4	ballpoint pen springs	Spring	READY
6	M8×370mm	Threaded rod	3 per side - READY (Thanks Mark!)
4	M8×294mm	Threaded rod	front / rear - READY 4 x 340 (Needs cutting)
3	M8×440mm	Threaded rod	top / bottom - READY
2	M8×210mm	Threaded rod	Z-leadscrew - READY 2 x 300 (Needs cutting)
1	M8×50mm	Threaded rod	or bolt for X idler - READY
2	8mm×420mm	Smooth rod	X-bar - READY
2	8mm×406mm	Smooth rod	Y-bar - READY
2	8mm×350mm	Smooth rod	Z-bar - READY
1	225mm×225mm print top plate	Thick Sheet	(space)
1	140mm×225mm print bottom plate	Thick Sheet	space
1	840mm×5mm T5 pitch timing belt	Belt	READY
1	1380mm×5mm T5 pitch timing belt	Belt	READY
5	NEMA 17 bipolar stepper motor	Stepper	John
50	small cable binder / ziptie	Misc	READY
1	Wade's Geared Extruder		(John)
1	Electronics + endstops		gen3 from John or Tiny G from Alden
1	Printed parts		READY

John

1x gen3 mobo 2x gen3 EC 5x steppers 4x stepper controllers (we'll have to pull these from the cupcake and have the cupcake use the mbi ones) 1x p4ac 4 axis stepper controller carrier board (we'll have to pull this from the cupcake too) 1x wade's extruder (assembled and working) 1x 36mm brass barrel 1x 0.5mm mbi nozzle 1x 0.5mm makergear bighead nozzle Insulator materials (have to make and document on lathe) nuts/bolts/washers - I have tons plywood/mdf for build platform

Heated Build Platform

If we want it, can get away with some other hacks if we want, or leave it out altogether.

Offers

Alden has a Tiny G board... this is attractive